DTC codes / Chrysler codes / P1683
P1683 on Chrysler vehicles means the speed control (cruise control) power relay or the 12-volt driver circuit to the speed control servo is open or shorted. The powertrain control module (PCM) monitors the relay control circuit and the voltage supplied to the servo, and it sets this code when the expected voltage is missing or outside the acceptable range.
Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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